During her shopping trip, Gwen bought three different types of pencils, L, M and N in the ratio of 5 : 2 : 9. She decided to sell them at the prices listed as shown.
Pencil L : $2.90
Pencil M : $0.90
Pencil N : $0.60
Given that Gwen bought a total 400 pencils, how much did Gwen collect from the sale of all the pencils?
|
Pencil L |
Pencil M |
Pencil N |
Total |
Ratio of pencil |
5 u |
2 u |
9 u |
16 u |
Value of each pencil |
$2.90 |
$0.90 |
$0.60 |
|
16 u = 400
1 u = 400 ÷ 16 = 25
Number of Pencil L
= 5 x 25
= 125
Number of Pencil M
= 2 x 25
= 50
Number of Pencil N
= 9 x 25
= 225
Total revenue
= 125 x 2.90 + 50 x 0.90 + 225 x 0.60
= 362.50 + 45.00 + 135.00
= $542.50
Answer(s): $542.50